pgsql: Run updated copyright.pl on HEAD and 9.2 trees, updating the psq

Run updated copyright.pl on HEAD and 9.2 trees, updating the psql
\copyright output to 2012.

Backpatch to 9.2.

Branch
------
REL9_2_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/81aa2a5d1ca84fd56d17bb3dfd36ae1faaa666d5

Modified Files
--------------
src/backend/catalog/genbki.pl | 2 +-
src/backend/utils/Gen_fmgrtab.pl | 4 ++--
src/bin/psql/help.c | 2 +-
src/tools/copyright.pl | 4 +++-
4 files changed, 7 insertions(+), 5 deletions(-)